Not running as fast :-)

Johanna
I love running but am not very fast normally and I am getting slower all the time now. I really don't mind, I am happy that I still can run a slow 5K and only feel tired and a some slight heaviness in my stomach afterwords. 
I have never run when pregnant before so I have no idea how long I will be able to keep this up. Am now 13 weeks with baby number three and am 45. Anyone been able to keep running most of your earlier pregnancies? I would love to be able to keep running indoor when the winter comes for as long as possible.